Roots up is a nice solution to collect data in dry areas. Making use of the steam produced during the day and the low temperature reached at night, small water droplets are collected in a tank to water plants.
Roots up is a small greenhouse for farming. Throughout the day, high temperatures are reached inside. It forces evaporation in plants creating a really humid atmosphere. At night, temperature decreases and the greenhouse is open. This makes fresh air go inside creating small drops of water. These droplets are gathered in a tank.
Thanks to this solution, farming is possible in desert or dry areas. Moreover, this water is also suitable for being drunk by humans.
You can watch the following video to better understand how it works:
You can find more information in Roots Up webpage.